Godot

Name	Godot
Website	opensimulator.org
Free	Yes
Multiplatform	Yes
Physics engine	Yes
Sound and music	Yes
Persistent worlds	Yes Possible
Data logging	Yes Possible
Object manipulation at runtime	Yes
Animated gestures	Yes Possible
Collaborative Editing	Yes Possible
Chat and IM	Yes ENET IPv4
Server-client networking	Yes ENET IPv4
Opt-out content rights	Yes Possible
Friends lists	Yes Possible
Texture upload at runtime	- Possible
3D model upload at runtime	- GDScript or ASSIMP
HTML4 on an object	No C++ module
Voice Chat / VoIP	No C++ module
e-Commerce	No
Appearance customization	- Upload mesh
Heightmap terrain	Yes
Runs on low spec devices	Yes
Used by a large community	- Small
Imports OAR files	No
Commercial use	Yes
Low Monthly costs	Yes Self-host
Complex 3D shape editing	No GDScript or C++
Imports IAR files	No
Open source	Yes
Tutorials and documentation	*3.0/5* 1 rating
Vehicles and alternate control	*3.0/5* 1 rating
User Interface scripting	*5.0/5* 1 rating
Backups	Yes Possible
Scriptable characters	Yes
Combat and interaction	Yes Possible
Scalability	- Possible
Scripting at runtime	- C++ module
Existing VR support	- GDScript or C++
Animated 3D models	Yes
Command-line and APIs	Yes Possible
Shared content library	Yes Possible
Large region sizes	Yes Possible
Used by large companies	- Indie Devs
Content marketplace	No
HTTPS and Cookies	Yes
Stereoscopic 3D	Yes Possible
HTML5 on an object	No C++ module
Skeletal tracking	No C++ module
Hand tracking	No C++ module
Mobile support	Yes Native
Pathfinding and AI	Yes Possible
Augmented Reality (AR)	- C++ module
Peer-to-peer networking	No C++ module
Cameras	Yes
Render-to-texture	Yes
HTML5 Client	No Broken
Garbage collection	Yes Possible
Opt-in content rights	Yes Possible
Future migration options	Yes
Game console support	No Not public
Minimal network data	Yes Possible
Animate at runtime	- Possible
Soft body physics	No
Physcally based rendering	No Future version